Possible solution for CSV attachments not being sent.
On shared hosting with php’s safe mode on, the
sys_get_temp_dir()function used in
/display/processing/attachment-test.phpon line 12 can fail. However, for me, WP’s built-in
get_temp_dir()worked as a replacement.
I don’t know if there is a particular reason not to use the built-in function, but it has fixed a problem for me.
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